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v3.6.0.2

Note 2 - Summary of Significant Accounting Policies (Details Textual) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Percentage of Reserves for Doubtful Accounts Receivable |  |  | 100.00% |
Contract Receivable Retainage |  |  | $ 0 | $ 229,000
Tangible Asset Impairment Charges |  |  | 1,816,000 |
Depreciation |  |  | 3,717,000 | 3,246,000
Research and Development Expense |  |  | 2,046,000 | $ 2,302,000
Decrease in Prepaid and Other Assets [Member] | December 31, 2015 [Member] |  |  |  |
Prior Period Reclassification Adjustment |  |  | (152,000) |
Decrease in Current Portion of Long-term Debt [Member] | December 31, 2015 [Member] |  |  |  |
Prior Period Reclassification Adjustment |  |  | (27,000) |
Decrease in Long-term Debt, Less Current Portion [Member] | December 31, 2015 [Member] |  |  |  |
Prior Period Reclassification Adjustment |  |  | $ (125,000) |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Number of Major Customers |  |  | 2 | 1
Federal Government [Member] |  |  |  |
Revenues |  |  | $ 27,354,000 | $ 36,105,000
Federal Government [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member] |  |  |  |
Revenues |  |  | $ 27,354,000 | $ 36,105,000
Concentration Risk, Percentage |  |  | 53.40% | 57.90%
PSC Metal, Inc. [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member] |  |  |  |
Revenues |  |  | $ 9,763,000 |
Concentration Risk, Percentage |  |  | 19.10% |
Number of Major Customers |  |  | 1 |
Prologis Teterboro, LLC [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member] |  |  |  |
Revenues |  |  |  | $ 10,686,000
Concentration Risk, Percentage |  |  |  | 17.10%
Number of Major Customers |  |  |  | 1
Customer A [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 10.10% | 16.20%
Customer B [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |
Concentration Risk, Percentage |  |  | 20.80% |
Medical [Member] |  |  |  |
Research and Development Expense |  |  | $ 1,489,000 | $ 2,114,000
Treatment [Member] |  |  |  |
Research and Development Expense |  |  | 504,000 | 179,000
Goodwill, Impairment Loss |  |  | 0 | 0
Treatment [Member] | Federal Government [Member] |  |  |  |
Revenues |  |  | $ 21,434,000 | 30,130,000
PCB Permit [Member] |  |  |  |
Number of Definite-lived Permits |  |  | 1 |
M&EC [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 1 year 219 days |  |
Tangible Asset Impairment Charges | $ 1,816,000 | $ 1,816,000 |  |
Minimum [Member] | M&EC [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 2 years |  |
Maximum [Member] | M&EC [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  | 28 years |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 10 years |
Building and Building Improvements [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 40 years |
Furniture and Fixtures [Member] | Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 7 years |
Workers Compensation [Member] |  |  |  |
Escrow Deposit |  |  |  | $ 35,000

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